Vulcanizer



0. M. FREDD. VULCANIZER. APPLICATION FILED DEC. 6, 1920- 'Patented Apr. 5, 1921.

INVEN TOR.

A TTORNE Y.

UNITED STATES ICE.

Specification of Letters Patent.

Patented Apr. 5, 1921.

Application filed December 6, 1:...0. Serial 1%. 428,527.

To all whom it may concern:

' Be it known that I, OSCAR M. Fnnpo, a citizen of the United States, and resldlng at Hancock, in the county of Houghten and State of Michigan, have invented a new and Improved Vulcanizer, of which the following is a specification.

This invention relates to means for repairing the casings of pneumatic t res for motor vehicles by vulcamz ng adhesive materials or patches into position, and its object is to provide a mold adapted for such purpose which may be assembled without the use of packing strlps between the several parts and in which the several members may be so heated as to gave the best results.

This invention consists in the details of construction illustrated in the accompanying drawing and partlcularly pointed out in the claims.

In the drawing, Figure 1 1s a sectlon of my improved vulcanizer on the line l-1 of Fig. 2. Fig. 2 is a s1de elevation thereof. Fig. 3 is an elevation of a bag adapted to be placed within the casing and to be heated with steam. Fig. 4 is a perspectlve of a tread block. Fi 5 is a section, similar to the lower part 0 Fig. 1, of a modlfied form of mold.

Similar reference characters refer to like parts throughout the several views.

Cuts in the rubber exteriors of automo-- bile tire casings may-often be closed so as to make the casing as good as before by filling in some uncured or unvulcanized rubber and then heating that portion of the casing to above the temperature where rubber vulcanizes whlle malntainlng a pressure thereon. In other cases, patches may often be applied to casings to great advantage. The molds for this purpose may be heated to the desired temperature by steam under pressure, which ma be obtained at any convenient source. en the mold is made of sections, a fewextra parts permit such molds to take care of casings of many dif-' ferent sizes.

In Figs. 1 and 2 I have shown the side heating chambers 1 provided with integral thimbles 2 through which the assemblmg bolts 3 may pass, and with the flanges 4, preferably inclined, to receive the hooks 5 and 6. The hook 5 is shown attached to the bar 7 on which the hook 6 is slidable, a pin 8 positioning'the hooks relative to "each other. A nut 9 in this bar 7 receives the screw 10 which may have a hand wheel 12 at 1ts upper end and a plate 13 at the. lower end.

Between the side chambers 1 is the hollow base block 14 whose up er and lower surfaces A are preferably. cy indrical and WhlCh has tubu ar connectors 15 between the parallel s1de walls 16, the bolts 3 being adapted to extend through these connectors; On the base block are mounted the tread blocks 17 which are formed to fit one particular size and many cases they may be used for casings which vary somewhat in type and in both lnternal or tube diameter and wheel ditype of casing although in ameter. A pair of bead blocks 18 complete the installation and these may also usually be used for several types and sizes of tires. The tread blocks and bead blocks are generally triangular in cross section and may be formed of cast iron with steel ed e strips 19 attached thereto, as shown in 1g. 4, so as to avoid chipping of these edges.

Each side chamber 1 is preferably provlded with a. feed connection 20 to supply steam and a drain connection 22, while the base block 14 may have the feed connection 23 and discharge connection 24. Heat may thus be applied at the exact point desired and waste of steam prevented. In order to secure proper pressure between the casing and the bead and tread blocks and also to assist in attaining the desired temperature, I provide a steam ba 26 for each inner diameter of easing, WhlCh bag has an inlet tube 27 for steam and a discharge tube 28, the latter preferably extending to the middle of the bag so that it may drain off the condensed water at all times. Both of these tubes are preferabl flexible.

When a casing X has been prepared for vulcanizing, the sides, tread blocks and base of the mold are loosely assembled on any desired support-29 and the casing A with the inserted steam bag is placed within the mold with the part to be repaired central of the length of the mold. *The bead blocks are then inserted, the locking bar 7 and its hooks 5 and 6 positioned and the screw 10 turned downto bring the plate 13 against the bead blocks. The thumb nuts 30' on the bolts 3 are then turned down to lock the sides and base together, .the screw 10 is turned to complete the desired pressure on the bead blocks, and steam is. turned into 1 next the injury.- As the temperature of the steam may be determined by. the pressure, accurate control of the o eration of this device is possible and satis actory vulcanizing assured. b

The base block need not. be wide enough to engage the sides 1, as the tread blocks 32 ferent slzes of tires.

ineednot be had in the (Fig. 5) ma have flanges 33 to extend down on each si e of the base block 34 between it and the side chambers 35. This view also shows a smooth casing B having no such central wearing tread as on the casing A in Fig. 1. This-structure also results where the base member 34 is not of suflicient width to accommodate the larger tires, but by the use of the tread blocks 32, larger sizes of tires may be repaired.v

The engaging sides of the several members are preferably quite exactly finished, but the extreme accuracy necessary when such engaging sides necessarily make steam tight joints, even when packing is used,

present structure.

The nut 9 is shown w1th flanges above and below the cross bar 7 which is formed with a slot '2' to permit the nut to be slid longitudinally of this cross bar to suit it to dif- The hooks 5 and 6 are preferably widened at their lower ends where they engage the flanges 4, as shown in Fig. 2, in order to prevent the bar 7 from tipping. It will be understood that the strips 19 on the tread and bead blocks may be of any desired'width, depending on the ideas of the designer. a

The details and proportions of the Various parts may all be changed by those skilled in the art without departing from the spirit of my invention as set forth in the following claims.

I claim 1. In a tire vulcanizer, the combination of hollow side chambers and a hollow base block between them, said parts having alined passages, bolts extending through the passages, pipes to supply steam to said members, tread blocks and bead blocks adapted to fit around a tire casing between said sides,

. and means to press the bead blocks toward the tread blocks.

2. In a. tire vulcanizer, the combination of hollow side chambersand a hollow base block between them, said parts having alined aerator within the tire casing, and means to supply steam to said bag, said means consisting of a supply tube connecting to one end of the bag and a discharge tube extending into the other end of the bag to about the middle thereof.

4. In a vulcanizer, the combination of hollow side chambers and a hollow base block between them, means to secure them together, pipes to supply steam to said members, tread blocks separate from the base block and bead blocks adapted to fit around a tire casing between the side chambers, and means connected to the upper edges of said sides to force the bead blocks toward the tread blocks.

5. In a vulcanizer, the combination of hollow side chambers and a hollow base block between them, means to secure said.

members together, pipes to supply steam to said members, tread blocks and bead blocks of generally triangular cross section adapted to fit around a tire casin between'the' side chambers, said side cham ers having downwardly and outwardly inclined flanges along their upper edges, a cross bar extending across the top of said side chambers,

books attached to said barand engaging a said flanges, one of said hooks being ad]ustable on said bar, said bar having a nut between said side chambers, a screw mounted in said nut, and a plate at the lower end of said screw adapted to engage the bead blocks which may be forced toward the tread blocks by said screw.

6. In a tire vulcanizer, the combination of hollow side chambers and a hollow base block between them, said parts havin alined passages, bolts extending through t e passages, pipes to supply steam to said members, tread blocks and bead blocks adapted to fit around a tire casing between said sides, and means to press the bead blocks toward the tire blocks, the side chambers and thebase block having tubes extending between their walls and integral therewith to receive said bolts and prevent leaka e of steam.

' OSCAR FREDD. 

